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Chin. Phys. B, 2008, Vol. 17(10): 3907-3909    DOI: 10.1088/1674-1056/17/10/058
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Magnetic properties of soft layer/FePt--MgO exchange coupled composite perpendicular recording media

Yin Jin-Hua(阴津华)a), Takao Suzukib), and Pan Li-Qing(潘礼庆)a)
a Department of Physics, University of Science and Technology Beijing, Beijing 100083, China; b Information Storage Materials Laboratory, Toyota Technological Institute, 2-12-1, Hisakata, Tempaku-ku, Nagoya 468-8511, Japan
Abstract  The magnetic properties of exchange coupled composite (ECC) media that are composed of perpendicular magnetic recording media FePt--MgO and two kinds of soft layers have been studied by using an x-ray diffractometer, a polar Kerr magneto-optical system (PMOKE) and a vibrating sample magnetometer (VSM). The results show that ECC media can reduce the coercivities of perpendicular magnetic recording media FePt--MgO. The ECC media with granular-type soft layers have weaker exchange couplings between magnetic grains and the magnetization process, for ECC media of this kind mainly follow the Stoner--Wohlfarth model.
Keywords:  exchange coupled composite media      perpendicular magnetic recording media      magnetic properties  
Received:  17 April 2008      Revised:  13 May 2008      Accepted manuscript online: 
PACS:  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  75.50.Ss (Magnetic recording materials)  
  78.20.Ls (Magneto-optical effects)  
  75.50.Vv (High coercivity materials)  
  75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))  
Fund: Project supported by the Japanese Storage Research Consortium (SRC) and the Grant-in-Aid for Scientific Research (A) of the Japanese Ministry of Education, Culture, Sports, Science and Technology (Grant No 14205049).

Cite this article: 

Yin Jin-Hua(阴津华), Takao Suzuki, and Pan Li-Qing(潘礼庆) Magnetic properties of soft layer/FePt--MgO exchange coupled composite perpendicular recording media 2008 Chin. Phys. B 17 3907

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